diff --git a/src/core/SkRegion.cpp b/src/core/SkRegion.cpp
index 38d12d2..a50425a 100644
--- a/src/core/SkRegion.cpp
+++ b/src/core/SkRegion.cpp
@@ -1136,7 +1136,8 @@
             tmp.fRunHead = SkRegion_gRectRunHeadPtr;
         } else {
             int32_t ySpanCount, intervalCount;
-            if (buffer.readS32(&ySpanCount) && buffer.readS32(&intervalCount)) {
+            if (buffer.readS32(&ySpanCount) && buffer.readS32(&intervalCount) &&
+                intervalCount > 1) {
                 tmp.allocateRuns(count, ySpanCount, intervalCount);
                 buffer.read(tmp.fRunHead->writable_runs(), count * sizeof(RunType));
             }